What are the details of Tish and Fonny's first conversation in Section One of the novel, If Beale Street Could Talk?

Fonny is in jail and Tish goes to visit him. She describes the situation: She is seated on a bench on one side of the glass and he on the other. They have to use a telephone to speak to one another. Tish tells Fonny that she is pregnant, and he cannot stop smiling.